A new technique for rapid and non-destructive measurement of rock-surface moisture content; preliminary application to weathering studies of sandstone blocks

2000 ◽  
pp. 47-54 ◽  
Author(s):  
Yukinori Matsukura ◽  
Ken'ichi Takahashi
Keyword(s):  
Moisture Content ◽  
New Technique ◽  
Rock Surface ◽  
Surface Moisture ◽  
A New Technique ◽  
Destructive Measurement ◽  
Non Destructive ◽  
Preliminary Application

Optical Characterization of Silicon-On-Insulator

1996 ◽  
Vol 446 ◽  
Author(s):  
G. G. Li ◽  
A. R. Forouhi ◽  
I. Bloomer ◽  
A. Auberton-Herve ◽  
A. Wittkower
Keyword(s):  
Optical Constants ◽  
Crystalline Silicon ◽  
Interface Roughness ◽  
Silicon On Insulator ◽  
Native Oxide ◽  
Buried Oxide ◽  
A New Technique ◽  
Silicon Islands ◽  
Destructive Measurement ◽  
Non Destructive

AbstractA new technique, referred to as the “n&k Method”, is used to characterize the thin films comprising Silicon-on-Insulator (SOI). With the “n&k Method”, a non-destructive robust measurement of the thickness of both the crystalline silicon top-layer and the buried oxide under-layer, the spectra of refractive index (n), and extinction coefficient (k), and the smoothness of the interfaces is established. The “n&k Method” determines these quantities simultaneously and without multiple solutions for thickness. The non-destructive measurement of interface roughness between the buried oxide under-layer and the silicon substrate is associated with the presence of silicon islands. The native oxide that forms on SOI is also detected and measured. No initial user's input for thickness and optical constants are required in order to obtain these results. The spectra of optical constants are measured accurately and reliably.

scholarly journals Reflectance Measurements on Cultural Heritage

2021 ◽  
Author(s):  
Antonio Alvarez Fernandez-Balbuena ◽  
Daniel Vázquez Moliní ◽  
Ángela Gómez-Manzanares ◽  
Juan Carlos Martínez-Antón ◽  
Santiago Mayorga Pinilla
Keyword(s):  
Cultural Heritage ◽  
Measurement Techniques ◽  
New Technique ◽  
Projection System ◽  
Reflectance Measurement ◽  
Spectrally Selective ◽  
A New Technique ◽  
Non Destructive ◽  
Reflectance Measurements ◽  
Non Destructive Techniques

Cultural heritage is a valuable and characteristic symbol of every country. It should be handled with care and it must be exhaustively investigated and measured with non-destructive techniques. In this chapter, we will talk about different reflectance measurement techniques to obtain the conservation state of the artwork. With this reflectance characterization, conservators, and curators could soon determine the best maintenance procedures for restoration purposes. Also, a new technique for lighting will be discussed, where the artwork can be also photonically restored illuminating with the correct light in the desired area of the artwork using a spectrally selective projection system.

In Situ Analysis of Hygrothermal Performance of the Sedlec Ossuary

2015 ◽  
Vol 1126 ◽  
pp. 22-27
Author(s):  
Zbyšek Pavlík ◽  
Lukáš Balík ◽  
Jiří Maděra ◽  
Lucie Kudrnáčová ◽  
Robert Černý
Keyword(s):  
Czech Republic ◽  
Moisture Content ◽  
Moisture Distribution ◽  
Wall Surface ◽  
Moisture Meter ◽  
Hygrothermal Performance ◽  
Historical Masonry ◽  
Destructive Measurement ◽  
Non Destructive

In situ analysis of hygrothermal state of the Sedlec Ossuary, Czech Republic, is presented in the paper. Within the experimental analysis, the measurement of moisture distribution in several profiles of historical masonry is done on a gravimetric principle. Non-destructive measurement of moisture content on the wall surface is done as well, using a capacitive moisture meter. Moreover, the interior and exterior climate is monitored over an almost two year period. On the basis of the obtained experimental results the hygrothermal conditions in both the masonry and the interior are assessed, including the identification of main moisture sources.

scholarly journals Indirect measurements of water content using TDR-inferred dielectric permittivity and electrical resistivity

2019 ◽  
Vol 92 ◽  
pp. 02005
Author(s):  
Bruna de Carvalho Faria Lima Lopes ◽  
Laís de Carvalho Faria Lima Lopes ◽  
Alessandro Tarantino
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Permittivity ◽  
Moisture Content ◽  
Water Content ◽  
Time Domain Reflectometry ◽  
Moisture Distribution ◽  
Salt Mines ◽  
Destructive Measurement ◽  
Non Destructive

The measurement of moisture distribution in Engineered Barrier Systems (EBS) in salt mines and deep geological disposals is essential in order to monitor fluid ingress and record data for long-term security analyses. Additionally, soil moisture content has influence over the mechanical properties of the soil as well as plant growth, soil stability and contaminant transport to cite some. Therefore, finding affordable and reliable ways to determine moisture content, quickly and in the field without sampling, is of great interested among people in different subject areas. Time-domain reflectometry (TDR) has become a recognized electromagnetic method for non-destructive measurement of dielectric permittivity and electrical conductivity of moist porous materials. It turns out that both these measurements depend on the material moisture content, among other things. This paper presents a series of calibration tests performed on soil samples. TDR probes were used to obtain the dielectric permittivity and electrical conductivity of the samples. As a consequence, relationships between these measurements and the samples' volumetric water content were later established. These relationships can then be used to indirectly determine that important information of water content on similar soil material using cheap, quick and non-destructive TDR probes.

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